Questions and Answers
In a control system, what is used to automatically control a process or operation?
Feedback controller
What is the programming method still in use for programmable logic controllers (PLCs)?
Ladder logic
What type of control system uses interconnected electrical relays and cam timers historically?
Logic control system
For continuously modulated control, what is used to compare the process variable with the desired setpoint?
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What type of control system is used to bring the process variable output of the plant to the same value as the setpoint?
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Study Notes
Control Systems
- A control system uses a controller to automatically control a process or operation.
Programming Methods
- Ladder Logic is a programming method still in use for programmable logic controllers (PLCs).
Historical Control Systems
- Relay-based control systems use interconnected electrical relays and cam timers.
Continuously Modulated Control
- A comparator is used to compare the process variable with the desired setpoint in continuously modulated control.
Control System Types
- A feedback control system is used to bring the process variable output of the plant to the same value as the setpoint.
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